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Our premium men's merino wool underwear is made from silky soft merino wool and a touch of LYCRA® for the perfect fit. Lightweight, soft, and breathable, our merino wool base layer collection will help keep you warm and dry. Part of a perfect layering system, Icebreaker's men's merino wool underwear helps preserve body heat for warmth in the cold and keep release air pockets to keep you cool in warm temperatures. Plus, our men’s merino wool base layer collection, like all of our merino wool mens clothing, is odor-resistant and easy to care for, making it perfect for travel and all your outdoor activities. Check our other merino wool layering options including: men's t-shirts, hoodies and leggings. Feel the difference in Icebreaker’s warm, soft, and comfortable men's merino wool underwear, today.